I am wondering if John Marion Mounce is my Grandfather. I was always told his name was Marion. If this is the same person, he was married to my Grandmother and lived in Illinois. When he was away at WWI, she divorced him. He was born in Oklahoma on a reservation, his Mother being Native American. I'm looking at the Family Search Index this is the only Marion Mounce who served in the war and lived in Illinois.

Please respond.
Jan Barrett